JP2013187134A - Contact device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact device which enables a movable contact to smoothly move and secures an enlargement space of an arc.SOLUTION: A contact device includes: a base 41; a movable contact 29 housed in the base 41; and one or multiple rotation stopper parts 50 which is (are) provided between the movable contact 29 and the base 41 as a body separated from the movable contact 29 and regulates (regulate) rotations of the movable contact 29. Rotation direction movements of the movable contact 29, which moves in one direction, are regulated by any one of the rotation stopper parts 50.

Description

  The present invention relates to a contact device.

  Conventionally, in order to restrict the rotational movement of the movable contact when the movable contact provided with the movable contact is brought into contact with or separated from the fixed contact, between the movable contact and the base housing the movable contact. A contact device provided with a rotation stopper is known (for example, see Patent Document 1).

  In Patent Document 1, a protrusion as a rotation stop is provided on the long side of the movable contact, and when the movable contact rotates, the protrusion contacts the inner wall surface of the sealed container as a base. By doing so, the rotation of the movable contact is regulated. At this time, only one of the two corners of the pair of projecting pieces is brought into contact with the inner wall surface of the sealed container. By doing this, the frictional force when sliding the inner wall surface of the sealed container by the movement of the movable contact to and from the fixed contact is reduced, so that the movable contact can be operated smoothly and The reliability of the opening / closing operation can be improved.

JP 2010-192416 A

  However, in the above-described prior art, the protruding piece provided on one side of the long side of the movable contact is brought into contact with the inner wall surface of the long side of the sealing container opposite to the projecting piece. Rotation is regulated. Therefore, when extending the arc generated when the movable contact and the fixed contact come in contact with each other, a space can be secured in the longitudinal direction of the movable contact, but a sufficient extension space is provided in the width direction. There was a problem that it could not be secured.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a contact device that can move a movable contact smoothly while ensuring a space for extending an arc.

  To achieve the above object, according to a first aspect of the present invention, there is provided a base, a movable contact housed in the base, and the movable contact between the movable contact and the base. One or a plurality of rotation stoppers that are provided separately and restrict the rotation of the movable contact, and the rotation stopper is any one of the rotational movements in one direction of the movable contact. The gist is to regulate it.

  The second feature is that the rotation stop portion is composed of one, the first contact surface that regulates the operation in the rotational direction in one direction of the movable contact, and the first contact surface that regulates the operation in the rotational direction in the other direction. And a contact surface.

  The gist of the third feature is that the rotation stopper is a protrusion provided on the inner wall surface of the base.

  The gist of the fourth feature is that the rotation stop portion is provided on the inner wall surface of the short side of the base facing the short side of the movable contact.

  The fifth feature is summarized in that a contact surface of the rotation stop portion with the movable contact is provided perpendicular to a rotation direction of the movable contact.

  According to this invention, while providing the rotation stop part which controls rotation of a movable contact between a movable contact and a base, the rotation stop is formed separately from the movable contact. For this reason, the base can be formed larger than the conventional one because it is not necessary to restrict the rotation of the movable contact by bringing the movable contact into contact with the inner wall surface of the base as in the prior art. Since the rotation of the movable contact can be restricted even if the base is formed large, it is possible to secure a sufficient space for extending the arc in the width direction in addition to the longitudinal direction of the movable contact. . Therefore, it becomes possible to extend the arc generated when the movable contact and the fixed contact come in contact with each other in the width direction of the movable contact, and to further improve the arc extinguishing performance (arc interruption performance). it can.

  In addition, since one or a plurality of rotation stoppers regulate the operation in the rotation direction in one direction of the movable contact by any one, the frictional force acting between the movable contact and the rotation stopper can be reduced. The movable contact can be moved smoothly.

  As described above, according to the present invention, the arc can be more reliably interrupted, and the frictional force when the movable contact is slid can be reduced, so that the reliability of the contact can be further increased. .

It is the figure which showed the external appearance of the case of the contact device concerning one Embodiment of this invention, (a) is a front view, (b) is a side view. (A) is AA sectional drawing of Fig.1 (a), (b) is BB sectional drawing of FIG.1 (b). It is a disassembled perspective view of the contact device concerning one Embodiment of this invention. It is explanatory drawing which showed the principal part of the contact apparatus concerning one Embodiment of this invention. It is explanatory drawing which showed the principal part of the contact apparatus concerning a 1st modification. It is explanatory drawing which showed the principal part of the contact apparatus concerning a 2nd modification. It is explanatory drawing which showed the principal part of the contact apparatus concerning a 3rd modification. It is explanatory drawing which showed the principal part of the contact apparatus concerning a 4th modification. It is explanatory drawing which showed the principal part of the contact apparatus concerning a 5th modification. It is explanatory drawing which showed the principal part of the contact apparatus concerning a 6th modification.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, with reference to FIGS. 1-3, schematic structure of the contact apparatus 1 concerning one Embodiment of this invention is demonstrated.

  The contact device 1 of this embodiment is applied to an electromagnetic relay. The contact device 1 includes a drive unit 2 located at the rear part (right side in FIG. 2) in FIGS. 2A and 2B and a contact part 3 located at the front part (left side in FIG. 2). These drive unit 2 and contact unit 3 are accommodated in the case.

  The case includes a substantially rectangular case base 7 and a case cover 9 that accommodates mounting parts such as the drive unit 2 and the contact unit 3 disposed on the case base 7. As shown in FIG. 3, the case base 7 has a pair of slits 71 and 72 in which the coil terminal 20 is mounted from above, and a pair of slits 73 and 74 in which the main terminal 10 is mounted from above. And the front side. On the other hand, the case cover 9 has an upper wall portion 9a, a left side wall portion 9b, a right side wall portion 9c, a front side wall portion 9d, and a rear side wall portion 9e, and is formed in a hollow box shape with the case base 7 side open. ing.

  The drive unit 2 includes a coil 13 wound around the coil bobbin 11, and a plunger cap 14 is disposed in a through hole 11 a formed at the center of the coil bobbin 11. At this time, an annular seat surface 11b is formed on the front side (front wall portion 9d side) of the coil bobbin 11, and the flange portion 14a of the plunger cap 14 is placed on the seat surface 11b, and the through hole 11a. The protrusion 14b of the plunger cap 14 is fitted into the. The coil terminal 20 is connected to the coil 13 wound around the coil bobbin 11 via a lead wire (not shown).

  A through hole 14c is formed at the center of the plunger cap 14, and a fixed iron core 15 as a fixed member is disposed on the front side in the through hole 14c, and a movable iron core 17 as a movable member is disposed on the rear side ( It is arranged on the rear side wall 9e side). A rubber cushion 12 is disposed on the further rear side of the movable iron core 17.

  Moreover, the yoke 19 is arrange | positioned between the coil 13 and the rear side wall part 9e. The yoke 19 has a bottom wall 19a facing the rear side wall portion 9e, and a pair of side walls formed so as to surround the periphery of the coil 13 from the periphery of the bottom wall 19a and facing the left side wall portion 9b and the right side wall portion 9c. 19b, 19c. An annular through hole 19d is formed in the bottom wall 19a of the yoke 19, and a bush 16 is attached to the through hole 19d.

  And the yoke upper board 21 is arrange | positioned so that the coil 13 wound around the coil bobbin 11 may be covered by the front end side (front side wall part 9d side) of a pair of side wall 19b, 19c of the yoke 19. FIG.

  The fixed iron core 15 has a protrusion 15a fitted in the through hole 21a of the yoke upper plate 21 and the through hole 14c of the plunger cap 14, and the flange portion 15b is formed on the seat surface 21b formed on the front side of the yoke upper plate 21. Fixed by placing. On the other hand, the movable iron core 17 located on the rear side of the fixed iron core 15 can move toward and away from the fixed iron core 15 in the through hole 14 c of the plunger cap 14.

  A through hole 15 c and a through hole 17 a are formed in the fixed iron core 15 and the movable iron core 17, and a return spring 23 is disposed between the fixed iron core 15 and the movable iron core 17. The return spring 23 presses the movable iron core 17 in the direction away from the fixed iron core 15 (the right side in FIGS. 2 and 3).

  Then, one end of the front side of the return spring 23 abuts on a pressing plate 49 fixed to the front side of the yoke upper plate 21. A rubber cushion 18 is disposed between the pressing plate 49 and the fixed iron core 15. On the other hand, an insulating plate 31 is disposed further on the front side of the pressing plate 49, and a contact pressure spring 33 is disposed between the insulating plate 31 and a movable contact 29 described later.

  The movable iron core 17 is provided with a shaft 25 extending along the moving direction of the movable iron core 17, and a movable contact 29 is attached to one end of the front side of the shaft 25. The movable contact 29 is provided with a movable contact 29b (see FIG. 2), and the movable contact 29b can freely contact and separate from a fixed contact 35d of a fixed terminal 35 to be described later.

  Moreover, in this embodiment, the screw 25b is formed in the other end part of the rear side of the shaft 25, and the flange part 25a is formed in the one end part of the front side. The movable contact 29, the insulating plate 31, the pressing plate 49, and the rubber cushion 18 are formed with a through hole 29a into which the shaft 25 is inserted, a through hole 31a, a through hole 49a, and a through hole 18a, respectively.

  The movable contact 29 is attached to one end of the shaft 25 as follows.

  First, as shown in FIG. 3, the movable iron core 17, the return spring 23, the rubber cushion 18, the pressing plate 49, the insulating plate 31, the contact pressure spring 33, and the movable contact 29 are arranged in this order from the rear side. At this time, the return spring 23 is inserted into the through hole 15c of the fixed iron core 15 in which the protrusion 15a is fitted into the through hole 21a of the yoke upper plate 21 and the through hole 14c of the plunger cap 14.

  Then, the other end side of the shaft 25 is inserted through the through holes 29a, 31a, 49a, 18a, the contact pressure spring 33, and the return spring 23 from the front side of the movable contact 29, and is connected to the movable iron core 17 by a screw 25b. To do.

  Thus, the movable contact 29 is attached to one end of the shaft 25.

  A pair of fixed contacts 35d are provided on the front side of the movable contact 29 so as to face the movable contacts 29b provided at both ends in the longitudinal direction of the movable contact 29 (left and right direction of the case cover 9). The fixed terminal 35 is arranged.

  The pair of fixed terminals 35 are mounted in the through holes 41 a formed in the base 41, so that the fixed contact 35 d provided at the other end on the rear side of the fixed terminal 35 becomes the movable contact 29 b of the movable contact 29. It is designed to protrude toward you. That is, the fixed terminal 35 has a flange portion 35a at one end portion on the front side, and the flange portion 35a is placed on the seat surface 41b provided on the front side of the base 41, and the protruding portion 35b on the other end side. Is inserted through the through hole 41a.

  The pair of fixed contacts 35d come into contact (contact) with the movable contact 29b, whereby the fixed contact 35d and the movable contact 29b become conductive. At this time, the contact pressure spring 33 presses the movable contact 29, so that each movable contact 29b contacts the fixed contact 35d with a predetermined contact pressure. The contact pressure spring 33 is set so that the spring load is lower than that of the return spring 23 described above. For this reason, in a state where the coil 13 is not energized and no driving force is applied to the movable iron core 17, the elastic force of the return spring 23 overcomes the elastic force of the contact pressure spring 33, and the movable iron core 17 is moved to the movable contact 29. At the same time, it moves in a direction away from the fixed iron core 15 to be in the state of FIGS.

  An annular mounting frame 37 is disposed between the flange portion 35a of the fixed terminal 35 and the seat surface 41b of the base 41, and the flange portion 35a, the mounting frame 37, and the seat surface 41b are connected to the first silver. It is fixed by welding through the braze 36 and the second silver braze 38.

  Further, a protrusion 35c is provided on the further front side of the flange portion 35a, and the main terminal 10 is attached to the fixed terminal 35 by fitting the through hole 10a of the main terminal 10 into the protrusion 35c. .

  The base 41 has a bottom wall 41c in which a pair of through-holes 41a are arranged side by side, and a cylindrical portion 41d that rises from the periphery of the bottom wall 41c, and the rear side (the movable contact 29 side) is opened. It is formed in a hollow box shape.

  The base 41 is fixed to the yoke upper plate 21 via the rectangular frame 40 in a state where the movable contact 29 is accommodated inside the cylindrical portion 41d from the opened rear side. The base 41 and the rectangular frame 40 are welded and fixed by a third silver braze 39.

  Further, a substantially U-shaped (substantially U-shaped) capsule yoke 30 to which the permanent magnet 31 is attached is disposed on the outer peripheral side of the cylindrical portion 41 d of the base 41 so as to face the movable contact 29. An arc generated when the movable contact 29 b of the movable contact 29 and the fixed contact 35 d of the fixed terminal 35 come into contact with each other can be extended by the permanent magnet 31.

  Next, the operation of the contact device 1 will be described.

  First, in a state where the coil 13 is not energized, the elastic force of the return spring 23 overcomes the elastic force of the contact pressure spring 33, the movable iron core 17 moves away from the fixed iron core 15, and the movable contact 29b becomes a fixed contact. The state shown in FIGS. 2A and 2B separated from 35d is obtained.

  When the coil 13 is energized from this off state, the movable iron core 17 moves closer to the fixed iron core 15 by being attracted to the fixed iron core 15 against the elastic force of the return spring 23 by electromagnetic force. As a result, the movable contact 29b of the movable contact 29 comes into contact with the fixed contact 35d of the fixed terminal 35 so that these contacts are electrically connected to each other and the contact device 1 is turned on.

  FIG. 4 is an explanatory view showing a main part of the contact device 1 according to the present embodiment. As shown in FIG. 4, the movable contact 29 is accommodated inside the cylinder portion 41 d of the base 41 so as to be movable relative to the fixed terminal 35.

  The movable contact 29 is provided in contact with the contact pressure spring 33, and when the contact pressure spring 33 extends and the movable contact 29 moves toward the fixed terminal 35, the spring winding direction is provided. The movable contact 29 is rotated in the reverse direction due to the reverse rotational force. Further, when the contact pressure spring 33 contracts and the movable contact 29 moves in a direction away from the fixed terminal 35, the movable contact 29 is rotated in the forward direction by receiving the rotational force in the winding direction of the spring. End up.

  As described above, when the movable contact 29 rotates as the movable contact 29 moves, the movable contact 29 has two diagonal points on the short sides of both ends of the longitudinal direction a, and the pressing force in the rotation direction is reduced. In the applied state, the base 41 slides on the long inner wall surface 41e. Therefore, the frictional force due to sliding increases, and the movable contact 29 may not be able to move smoothly.

  Therefore, in the present embodiment, a rotation stopper 50 that restricts the rotation of the movable contact 29 is provided between the movable contact 29 and the base 41, and the rotation stopper 50 is separated from the movable contact 29. Forming.

  Specifically, as shown in FIG. 4, the rotation stopper 50 of the present embodiment is configured as a protrusion protruding from the inner wall surface 41 e of the base 41 toward the movable contact 29. In this embodiment, two (a plurality) of the rotation stoppers 50 of the protrusions are used, and one of the protrusions is a first protrusion 50A that restricts the rotational movement of the movable contact 29 in the A direction. The other is functioning as a second protrusion 50B that restricts the rotational movement of the movable contact 29 in the B direction.

  Thus, in this embodiment, the two protrusions 50 </ b> A and 50 </ b> B are provided as the rotation stopper 50. In this way, even when the movable contact 29 rotates in either the forward direction or the reverse direction, the rotation of the movable contact 29 in one direction (for example, the A direction) is stopped by any one rotation stop. It can be regulated by the portion 50 (first protrusion 50A).

  Further, the rotation stopper 50 of the present embodiment is provided on the inner wall surface 41 e of the short side of the base 41 facing the short side of the movable contact 29. Specifically, in the present embodiment, the first and second protrusions 50A and 50B are arranged side by side on one side of the inner wall surface 41e of the pair of short sides, and are provided on one side thereof. The protrusions 50A and 50B protrude in parallel toward the inner wall surface 41e on the other short side. The short side on one end side in the longitudinal direction a of the movable contact 29 overlaps the protrusions 50A and 50B between the first protrusion 50A and the second protrusion 50B formed in parallel. It is arranged in the state where it entered.

  As described above, in the present embodiment, at least the short side on the one end side in the longitudinal direction a of the movable contact 29 is inserted between the first protrusion 50A and the second protrusion 50B. In this way, when the movable contact 29 rotates, the protrusions 50A and 50B as the rotation stopper 50 come into contact with the corners of the movable contact 29 so that the rotation can be restricted. .

  As described above, in this embodiment, the rotation stopper 50 that restricts the rotation of the movable contact 29 is provided between the movable contact 29 and the base 41, and the rotation stopper 50 is separated from the movable contact 29. It is formed with. For this reason, the base 41 can be formed larger than the conventional one because it is not necessary to restrict the rotation of the movable contact 29 by bringing the movable contact 29 into contact with the inner wall surface 41e of the base 41 as in the prior art. Become. Since the rotation of the movable contact 29 can be restricted even if the base 41 is formed large, the arc extending space is added to the longitudinal direction a of the movable contact 29 in the width direction b (the vertical direction of the case cover 9). ) Will also be able to secure enough. Therefore, it becomes possible to extend the arc generated when the movable contact 29b and the fixed contact 35d come in contact with each other also in the width direction b of the movable contact 29, and to achieve arc extinguishing performance (arc interruption performance). Can be increased.

  In addition, the pair (plurality) of rotation stoppers 50 regulates the operation in the rotation direction in one direction (for example, the A direction) of the movable contact 29 by any one (first protrusion 50A). . Therefore, the frictional force acting between the movable contact 29 and the rotation stopper 50 can be reduced, and the movable contact 29 can be moved smoothly.

  As described above, according to the present embodiment, the arc can be more reliably interrupted, and the frictional force when the movable contact 29 slides can be reduced. Therefore, the reliability of the contact (movable contact 29b And the reliability of contact and separation between the fixed contact 35d and the fixed contact 35d.

  In the present embodiment, the rotation stopper 50 is configured as a protrusion 50A (50B) provided to protrude from the inner wall surface 41e of the base 41. Therefore, the movable contact 29 can be prevented from coming into contact with the inner wall surface 41e other than the protrusion 50A (50B) of the base 41, and the rotation stopper 50 can be easily formed by being integrally formed with the base 41. . In the present embodiment, it is preferable to integrally mold the base 41 and the protrusion 50A (50B) using an insulating material such as a synthetic resin.

  Furthermore, in this embodiment, the rotation stopper 50 is provided on the inner wall surface 41 e on the short side of the base 41 facing the short side of the movable contact 29. Therefore, the amount of rotation when the rotation of the movable contact 29 is restricted is smaller than the configuration in which the rotation stopper 50 is provided on the inner wall surface 41 e of the long side of the base 41 facing the long side of the movable contact 29. There is an advantage that it is easy to do. Thereby, the pressing force to the rotation stopper 50 of the movable contact 29 can be suppressed, and the frictional force acting between the movable contact 29 and the rotation stopper 50 can be further reduced. Further, in the configuration in which the rotation stopper 50 is provided on the inner wall surface 41 e on the short side of the base 41, the movable contact 29 does not contact the corner of the rotation stopper 50 when the rotation of the movable contact 29 is restricted. There is also an advantage that scraping of the rotation stopper 50 can be suppressed. Accordingly, contact failure of the contact due to the accumulation of wear powder can be suppressed.

  Next, with reference to FIGS. 5 to 10, a modified example of the rotation stop structure (rotation stop 50) according to the present embodiment will be described.

  FIG. 5 is a view showing a rotation stopper structure according to a first modification. This modification is mainly different from the above-described embodiment in that a single rotation stopper 51 is configured, and the first contact surface 51b that restricts the operation of the movable contact 29 in the A direction in the rotational direction, and the B direction. And a second contact surface 51c for restricting the operation in the rotational direction.

  Specifically, the rotation stopper 51 of this modification is formed of a separate member from the base 41, and the rotation stopper 51 made of the separate member is attached to the inner wall surface 41 e of the base 41. A recess 51a that opens toward the movable contact 29 is formed in the rotation stopper 51 added to the base 41, and one end in the longitudinal direction a of the movable contact 29 is inserted into the recess 51a. ing. By doing so, when the movable contact 29 rotates, the pair of side wall surfaces in the recess 51a function as the first contact surface 51b and the second contact surface 5c.

  As described above, in this modification, when the movable contact 29 rotates in either the forward rotation direction or the reverse rotation, any operation in the rotational direction in one direction (for example, the A direction) of the movable contact 29 is performed. It can be regulated by one contact surface (first contact surface 51b).

  Even in this modified example having the above-described configuration, it is possible to obtain the same functions and effects as those of the above embodiment.

  Moreover, in this modification, the rotation prevention part 51 is comprised by one, the 1st contact surface 51b which controls the operation | movement of the rotation direction in the A direction (one direction) of the movable contact 29, and B direction (other direction) ) And a second contact surface 51c for restricting the operation in the rotation direction. Therefore, the operation in the rotational direction in one direction (for example, the A direction) of the movable contact 29 can be regulated by any one contact surface (first contact surface 51b), and the movable contact 29 and the rotation stopper 51 can be regulated. The frictional force acting between the two can be reduced.

  FIG. 6 is a view showing a rotation stopper structure according to a second modification. The main difference between the present modification and the first modification is that a recess 29b for allowing the rotation stopper 52 to enter is formed on the movable contact 29 side.

  Specifically, the rotation stopper 52 of the present modification includes one rectangular protrusion, and the protrusion is formed integrally with the base 41 on the inner wall surface 41e of the base 41, or Is a separate member provided on the inner wall surface 41e. And the recessed part 29b is formed in the short side facing the rotation stop part 52 in the longitudinal direction a one end side of the movable contact 29a, and the front-end | tip part 52a of the rotation stop part 52 is made to enter this recessed part 29b.

  Even in the present modified example having the above-described configuration, the same operational effects as those of the above-described embodiment and the first modified example can be obtained.

  That is, the first contact surface 52b can regulate the movement of the movable contact 29 in the direction A (one direction), and the second contact surface 52c can control the rotation direction in the direction B (the other direction). The operation can be restricted.

  FIG. 7 is a view showing a rotation stopper structure according to a third modification. This modification mainly differs from the first modification described above in that a rotation stopper 51 having a recess 51a is provided on the inner wall surface 41e of the long side of the base 41 facing the long side of the movable contact 29, This is because a convex portion 29 c that enters the opening of the concave portion 51 a is formed on the long side of the movable contact 29.

  Even in the present modified example having the above-described configuration, it is possible to obtain the same operational effects as those of the above-described embodiment and the first and second modified examples.

  That is, the first contact surface 51b can restrict the movement of the movable contact 29 in the A direction (one direction) and the second contact surface 51c can restrict the rotation direction in the B direction (the other direction). The operation can be restricted.

  FIG. 8 is a view showing a rotation stopper structure according to a fourth modification. This modification mainly differs from the second modification described above in that the rotation stopper 53 is provided on the inner wall surface 41e of the long side of the base 41 facing the long side of the movable contact 29, and That is, the concave portion 29b for allowing the rotation stop portion 53 to enter is formed on the long side.

  Even in the present modified example having the above-described configuration, it is possible to obtain the same operational effects as those of the above-described embodiment and the first to third modified examples.

  That is, the first contact surface 53b can restrict the movement of the movable contact 29 in the A direction (one direction), and the second contact surface 53c can control the rotation direction in the B direction (the other direction). The operation can be restricted.

  FIG. 9 is a view showing a rotation stopper structure according to a fifth modification. This modification mainly differs from the above embodiment in that the rotation stopper 54 is composed of two (plural) protrusions, and the rotation stopper 54 consisting of the two protrusions is replaced with a pair of short sides. One of the inner wall surfaces 41e is arranged on one side and the other side. One of the protrusions is a first protrusion 54A that restricts the rotational movement of the movable contact 29 in the A direction, and the other is a second protrusion that restricts the rotational movement of the movable contact 29 in the B direction. It functions as 54B.

  In the present embodiment, a pair of recessed surfaces 29d and 29e that are cut out in a substantially L shape are provided on the other end side and one end side in the longitudinal direction a of the movable contact 29. Projections 54A and 54B project so as to overlap 29d and 29e, respectively.

  Even in this modified example having the above-described configuration, it is possible to obtain the same functions and effects as those of the above embodiment.

  In other words, even when the movable contact 29 rotates in either the forward direction or the reverse direction, the rotation direction operation in one direction (for example, the A direction) of the movable contact 29 is performed by any one rotation stopper 54 ( The first protrusion 54A) can regulate.

  FIG. 10 is a view showing a rotation stopper structure according to a sixth modification. This modification is mainly different from the above embodiment in that a contact surface 56 (57) of the rotation stopper 50 with the movable contact 29 is provided perpendicular to the rotation direction of the movable contact 29. .

  Specifically, the rotation stopper 50 of this modification is configured with two (plural) protrusions as in the above embodiment, and the rotation stopper 50 composed of the two protrusions is a pair of protrusions. It is arranged in parallel on one side of the inner wall surface 41e of the short side. One of the protrusions is a first protrusion 50A that restricts the rotational movement of the movable contact 29 in the A direction, and the other is a second protrusion that restricts the rotational movement of the movable contact 29 in the B direction. 50B, both contact surfaces 56 and 57 are provided perpendicular to the rotation direction.

  Even in this modified example having the above-described configuration, it is possible to obtain the same functions and effects as those of the above embodiment.

  In this modification, the contact surface 56 (57) of the rotation stopper 50 with the movable contact 29 is provided perpendicular to the rotation direction of the movable contact 29. Therefore, the movable contact 29 and the contact surface 56 (57) of the rotation stopper 50 can be brought into line contact, and the movable contact 29 can be moved more smoothly. That is, in the above-described embodiment, since one end side in the longitudinal direction a of the movable contact 29 hits the contact surface at an acute angle, the contact surface of the rotation stopper 50 is scraped as the movable contact 29 slides, and the scraped contact surface is removed. There is a possibility that one end of the movable contact 29 in the longitudinal direction a is fitted. On the other hand, in this modification, since the movable contact 29 and the contact surface 56 (57) of the rotation stopper 50 can be brought into line contact, the fitting of the movable contact 29 can be suppressed. The reliability of the opening / closing operation can be further increased.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made.

  For example, in the sixth modified example, the case where the contact surface perpendicular to the rotation direction of the movable contact that is the characteristic part is applied to the rotation stop portion (a pair of protrusions) of the above embodiment is illustrated. The present invention can also be applied to one rotation stopper according to the first to fifth modifications.

  Further, movable terminals, fixed terminals, and other detailed specifications (shape, size, layout, etc.) can be changed as appropriate.

DESCRIPTION OF SYMBOLS 1 Contact device 29 Movable contactor 41 Base 41e Inner wall surface 50, 51, 52, 53, 54 Anti-rotation part 50A 1st protrusion (protrusion part)
50B Second protrusion (protrusion)
51b, 52b, 53b First contact surface 51c, 52c, 53c Second contact surface

Claims (5)

Base and
A movable contact housed inside the base;
One or a plurality of rotation stoppers provided separately from the movable contact between the movable contact and the base and restricting the rotation of the movable contact;
The said rotation stop part restrict | limits the operation | movement of the rotation direction in one direction of the said movable contact by any one.   The rotation stop portion is composed of one, a first contact surface that restricts the operation in the rotational direction in one direction of the movable contact, and a second contact surface that regulates the operation in the rotational direction in the other direction. The contact device according to claim 1, further comprising:   The contact device according to claim 1, wherein the rotation stopper is a protrusion provided to protrude from an inner wall surface of the base.   The contact point according to any one of claims 1 to 3, wherein the rotation stop portion is provided on an inner wall surface of a short side of the base facing a short side of the movable contact. apparatus.   The contact surface with the said movable contact of the said rotation stop part is provided perpendicularly | vertically with respect to the rotation direction of the said movable contact, The any one of Claims 1-4 characterized by the above-mentioned. Contact device.

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